Nailing table for box lidding machines



1951 H. D. BENSON NAILING TABLE FOR BOX LIDDING MACHINES 2 SHEETS-SHEET 1 Original Filed June 2, 1947 V INVENTOR .7-6 .2. Benson Mi: Mi:

ATTORNEYS Nov. 6, 1951 H. D. BENSON NAILING TABLE FOR BOX LIDDINC MACHINES Original Filed June 2, 1947 2 SHEETS-SHEET 2 RN mm INVENTOR Ji. .0 Benson ATTORNEYS Patented Nov. 6, 1951 NAILINGTABLE FORBOX Lippi-No Y MACHINES l Harry DQBenSon, Fresno, lalifr assig nor to Gene cral Nailing Machine Corporation, Sanger; Calif-,, a corporation of California,

Original application June .2, 1947, :Serial No. #531,741. Divided and this app ication il-unell,

v *7 Claims. 11 ,ii' a This application }a division of application Serial No. 751,741, filed June a, l94 7c; now Batent No. 2,536,416,;lated January? 19.51; l The invention relates to the box n ralring' ant and has particular reference to a hair xconyeyine' and s p g or naili g e erunit u w h .a box lidding machine to adeguately cqnileythe box into and out of thelzmachine and to locate and support the hog during the operationof nail. ne l d nthe-hc .V .7 v .In machi es. emplo ed to apply lids to i particularly those filled or oye filled with sea-- tents, con id rable pre su c ined totem: press the lid dcwnooto th hex c-o epara rywte nailing in ad iti n to the pressure which i employ d todrive he nails through the li s into e ends of theboxes. 7 up 7 H 7 .I is customary-;to.-feed the boxes r gressively thro h the nailing machine shy a conveyor mechanism with a temporary stop of the box during the nailing operation and i is anohiect of the p s t inv ntionto provide an rel ndless ha n conveyor deed means for the horses combination h a nailing 'supncr or anvil and l ca or "means-which will rapidly and er-ec ately eed the boxes. to the 'nailimg; Esta-nonr ac- .cu ately hold the box in nailing posit .h durin the nail ng operation. and thenautomaticallyrelease the :box after the nailing operation is comlete and ,deliverit out or 1 he:machine;..-afurther bj bein to here the conveyor element yieldable under the pressure exerted by the nailin headaeainst the :DQX, allow the latter to he bro ht in o a position of restiagainst rigid stop bars or anvils as the nails are being driven r u h th lid and into the box lends.

Other objects nd advanta es will the apparen .ircin a re ding of the following. specification. read in c nnection with the acccmpanying draw ingsin which n y Fig. 1 is a front elevation-of azcomn enaih ling machine incorporating. the improv d feeding andnailing table. l v.

Fig. 2 is :a -viewlcok ne in the directional the arrows on a line 2-4 of Fig. .1 and a frag zmentary view of oneside Of the nailingtableruni-t.

Fig. 3 is a crossysectional-view ztaken-onra line 7-3 Of FigLZ, l I

Fi 4 is a ross se io al r ewtaken gen rally .on a line 44 of Fig. ,2 but ShOWing.:th com veyor chain depressed-1111 a .Position substantially flush with the nailing table bar oranvil,

.5 is a fragmentary sectional yiew taken on aline 5-v-5 of Fig-.2.

a box h ld n and nai ng machine which may 'beof .any suitable typeknown in the boxlidding art in which the nailin unit reciprocates into and out vor engagement with the ,bo to .efiect the nailingoperation, the particular machineselected for illustration being of that type shown in co-pending application Serial No. 7511741, :and described in detail in that application, Briefly, the same includes a main upstanding supporting frame .I inwhichareseoureduprighttransversely spaced vertically slotted guide and mounting ,posts .2 in which is guided a vertically reciprocable driving bar 3 carrying the nailing units .4 which include .chuoks 5 which vare brought into pressure relation wi h the ox l d o. press them closely against the hex lends during the nailing operation. Such driving bar .3 is reciprocated by connecting rods 6 .on cranks 1 connected in drive ing relation with a motor-8.

The present invention is concerned only with the means to feed boxes below the nailin units. a nailing table and means to position and support theiboxes during the nailing operation. and all of which will now'be described :indetail.

A horizontal nailing table'har 79 extends across of eachpostz laterallyinwardly of thelatter. and is fixed to a horizontal side plate in which .extends in the same direction, 1. -e. lengthwise of the direction .of movement of boxes through the machine. The side plates Ill are in turn fixed ,to locator blocks :LI, each -.of which includes .a part extending, in locatin relation. in the vertical slot I2 of the adjacent post 2. The locator blocks ll arefitted with backccaps l3 whichnonmovabl but adiust bly clamp the iocator hlocks U to the respectiveposts 2.. In this manner the horizontal nailing table bars 9 are rigidly but .adjustably attached to the corr sp nding posts .2, A downwardly yieldably mounted, Jchain .supporting bar 14 extends alongside each horizontal nailing table .bar; the upper edges of vthe bars l4 and the .upper edges of the .bars ,9 normally .being substantially flush. The chain supporting bars M are ylieldahly mountediby means of bolts to engaging through vertically elongatedslots 1.6 in the bars 14; there being leaf springs 11 engaging said bars 14 from .below andlncrmally but yieldablyur ing the same upwardly to the limit of their yerticalmotion, asshownin-Figna Each yieldahly mounted bar 14 supports the upper run -I 8 of :an endless chain ll 9 which turns about :end sprockets 20 on opposite end portions of the bar J4; said endless chains it being splloflketedriven from a cross shaft 2.1 below :the

Referring to the (drawings, there is illustrated as nailing table assembly, and which cross shaft is 2, 3, and 5. When each box 24 engages the stops 25, the

"nails through the lid constantly actuated from the motor 8 by means including an endless chain and sprocket unit 22.

Adjustable idlers 23, as shown in Fig. 2, maintain proper tension on the chains l9.

Withfjfth'e'above arrangement it will be seen that the-upper runs l8 of the chains I 9 of the lidding table unit normally run above the upper edge of the horizontal nailing bars 9. When the machine is in operation, for lidding loaded boxes, the loaded boxes are fed, one at a time and by suitable means, onto the lidding table unit; each box 24, as it reaches the machine, resting at opposite ends on' the upper runs 18 of the chains I9, and being fed into said ma chine thereby. When the, box reachesa predetermined position below the lid nailing units.

4-5, said box abuts against box stops 25 carried "eration is complete, the" boxis automatically released whereupon it continues its movement on the conveying means which carries it out of the machine. y While this specification sets forth in detail the present and preferred construction of the device,

- still in pratcice suchdeviations from such detail by the side plates l adjacent the discharge end of the nailing table assembly and normally pro jecting into the path of box travel. Each stop 25 is mounted on a shaft 26 journaled in bearings 21 secured to one of the side plates 10. See Figs.

upper runs it of the chains l9 slip under said box, and thisslipping action continues during the nailing operation.

As each box 24 comes to rest against the box stops 25, the motor 8 is'activated in any conventional manner to drive the cranks l to cause the connecting rods 6 to efiectreciprocation of the driving bar 3 and nailing units 4-5 through one cycle of movement.

A lid'28 has previously been mounted in the nailing units in the manner described in detail in copending application Serial No. 751,741 and travels with said nailing units; As the nailing units 4- move downward and reach the box 24, the nailing chucks 5 press against the lid 28, and the latter presses against the top edges of 'the ends of the box 24. At this time the box 24 "is depressed by the pressure of the chucks 5, causing downward yielding of the upper chain runs l8 and the bars I '4 from the position of Fig. 3 to the position of Fig. land until the bottom of the box rests firmly on top of the horizontal nail- Jing table bars 9.

j With continued downward motion of the top driving bar 3, the nailing rods of the nailing unit drive through the nailing chucks 5 to drive the into the box end in the jusual manner.

Rods 29 are mounted on the driving bar 3 in any suitable manner and depend from the same and slidably engage through sleeves 38 connected to actuating linkage 3| on each stop 25. A collar 32 on each rod 29 engages the corresponding sleeve 30 and depresses it as the top driving bar ",3 reaches the bottom of its stroke, and at which time the nailing operation is completed.

When the collars 32 engage and shift the sleeves 30 downward, the box stops 25 swing upwardly, against the tension of torque springs 33, to a clearance position to permit of passage of the lidded box from the machine. These springs '33 are also compressible, being initially loaded "or compressed when'the box strikes the stops 25. Thus, when the stops are swung upward, the springs urge said stops rearward a limited distance but alongside the box and once the lidded box begins to travel, the stops 25 cannot return to stop position, by the torque of springs 33, until said lidded box is out of the machine.

I -From'the foregoing description it will be apparent that the objectives of the invention are may be resorted to as do not form a departure from the spirit'of'the invention as defined by the appended, claims.

Having thus described the invention, the following is claimed as new and useful, and upon which Letters Patent are desired:

' '1. In a nailing machine which includes a frame having transversely spaced upstanding posts, and work conveying and supporting table units attached to the posts; each table unit comprising a horizontal nailing table bar, means securing the nailing table bar intermediate its ends to the post. a chain supporting bar extending horizontally alongside the nailing table bar, means mountingthe chain supporting bar on the nailing table bar for limited downward motion from a normally raised position, spring means yieldably resisting such motion, and a driven, endless work-conveying chain mounted in a vertical plane with the upper run traveling on said chain supporting bar and normally in a horizontal plane above the top of the nailing table bar.

2. In a nailing machine which includes a frame having transversely spaced upstanding posts, and work conveying and supporting table units attached to the posts; each table unit comprising a horizontal nailing table bar, means securing the nailing table bar intermediate its ends to the post, a chain supporting bar extending horizontally alongside the nailing table bar, means mounting the chain supporting bar on the nailing table bar for limited downward motion from a normally raised position, spring means yieldably resisting such motion, and a driven, endless work-conveying chain mounted in a vertical plane with the upper run traveling on said chain supporting bar and normally in a horizontal plane above the top ofthe nailing table bar; the chain supporting bar mounting means including spaced elements projecting outward from the nailing table bar, and the chain supporting bar having vertically elongated slots in which said elements are disposed.

3. In a nailing machine which includes a frame having transversely spaced upstanding posts, and work conveying and supporting table units attached to the posts; each table unit comprising a horizontal nailing table bar, means securing the nailing table bar intermediate its ends to the post, a chain supporting bar extending horizontally alongside the nailing table bar, means mounting the chain supporting bar on the nailing table bar for limited downward motion from a normally raised position, spring means yieldably resisting such motion, and a driven, endless work-conveying chain mounted in a vertical plane with the upper run traveling on said chain supporting bar and normally in a horizontal plane above the top of the nailing table bar; the chain supporting bar mounting means including spaced elements projecting outward from the nailing table bar, and the chain supporting bar having vertically elongated slots in which said elements are disposed, and said spring means being leaf springs on the nailing table bar bearing against the bottom of the chain supporting bar.

4. In a nailing machine which includes a frame having transversely spaced upstanding posts, and work conveying and supporting table units attached to the posts; each table unit cornprising a horizontal nailing table bar, means se-' curing the nailing table bar intermediate its ends to the post, a chain supporting bar extend ing horizontally alongside the nailing table bar, means mounting the chain supporting bar on the nailing table bar for limited downward motion from a normally raised position, spring means yieldably resisting such motion, and a driven, endless work-conveying chain mounted in a vertical plane with the upper run traveling on said chain supporting bar and normally in a horizon-' tal plane above the top of the nailing table bar;

each post having a longitudinal slot thereframe having transversely upstanding posts,

and work conveying and supporting table units attached to the posts; each table unit comprising a horizontal nailing table bar, supporting means securing the nailing table bar intermediate 'its g, ends to the post, a chain supporting bar extending horizontally alongside the nailing table bar,

means mounting the chain supporting bar on the nailing table bar for limited downward motion from a normally raised position, spring means yieldably resisting such motion, and a driven;

endless work-conveying chain mounted in a" vertical plane with the upper run traveling on saidchain supporting bar and normally in a horizon-- tal plane above the top of the nailing table bar; the chain supporting bar terminating at its ends short of corresponding ends of the supporting means f r th na l g table nd hain engaging sprockets on said supporting means beyond opposite ends of the chain supporting bar.

6. In a nailing machine having an upstanding main frame, upstanding transversely spaced mounting members on the main frame and vertically reciprocable nailing units guided on said members and including chucks movable downwardly for work engagement prior to a nail driving operation, and transversely spaced work supporting table units on the mounting members below the nailing units; each table unit including a horizontal nailing-table bar extending horizontally through the machine, means securing the bar on the corresponding mounting member, a normally raised chain supporting bar extending horizontally alongside and lengthwise of the nailing-table bar, means mounting the chain supporting bar on the nailing-table bar for downward yielding movement from said normal raised position, an endless driven Work conveying chain arranged with its upper run riding on said chain supporting bar and normally above thelevel of the upper surface of the nailing-table bar, and means to simultaneously drive both chains in the same direction, the upper runs of the chains and the corresponding supporting bars yielding under the influence of the downward, movement and pressure of the nailing chucks on the work until the latter rests on the nailing-table bars.

7. A structure as in claim 6, with releasable stops on the table units arranged to stop the horizontal travel of the chain-supported Work through the machine when said work is in nailing position thereon.

HARRY D. BENSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,963,377 Paxton June 19, 1934 1,988,507 Paxton Jan. 22, 1935 2,114,724 Paxton Apr. 19, 1938 

